Beater roll



F. HAYES BEATER ROLL Sept. 30, 1952 Filed-Sept. 3, 1947 2 SHEETSSHEET lF. HAYES BEATER ROLL Sept. 30, 1952 Filed Sept. 5, 1947 2 SHEETSSHEET 2Patented Sept. 30, 1952 BEATER ROLL Frank Hayes, Hoosick Falls, N. Y.,assignor to Noble & Wood Machine 00., Hoosick Falls, N. Y., acorporation of New York Application September 3, 1947, Serial No.771,942

4 Claims.

My present invention relates to beater rolls, and more particularly tobeater rolls for use in connection with the manufacture of paper.

I-Ieretofore beater rolls have been constructed by building up on theroll body a filling consisting of bars and spacers. In one form of suchroll, the filling was segmental, each segment being riveted together asa unit, and each segment being provided with one extending bar whichfitted into a slot or keyway machined into the surface of thecylindrical roll body or shell. The individual segments were held to thecylindrical body or shell by so-called hook bolts spaced at intervalsacross the face of the shell, and at each end by cap screws turned fromunderneath the roll shell.

While this construction was practical it was never entirelysatisfactory, because it was dinicult to turn in the so-called hookbolts so that the contacting surfaces were on an exactly even planeacross the face of the roll; it was difficult to locate the holdingrods, which were built into the segments themselves, so that .these wereequally spaced from the bottom of the segment to the center of theholding rod; and. because each of the segments was of all metalconstruction, and in order to assure absolutely tight roll fillingconstruction, with no vibration or working of the various individualsegments, the sides must necessarily mate exactly one to the other amechanical job difficult enough in a, shop and even more so when makingreplacements in the field.

With this type of filling, failure in service was apt to occur whenthere was lack of proper contact on all the hook bolts across the faceof the roll in various segments, or lack of proper side bearing, segmentto segment, or both. Under such conditions, some of the segments mightwork, or lean sidewise, when submitted to bed plate pressures, resultingin undue strain being placed on the fixed cap screws holding down thesegments on the end, with the consequent shearing off of such screws.

In my present invention, I have obviated the faults in such priorconstruction by eliminating the necessity for machining longitudinalslots in the roll body and by eliminating the use of unit segmentscomprised of a plurality of spacers and roll bars.

According to my present invention I provide the roll body with onlyenough slots to divide the peripheral surface thereof into zones, mounton the roll body both roll bar and spacer locking means, and 'build upthe filling out of individual roll bars and spacers.

By this construction I am able to individually lock each roll bar andeach spacer to the roll body at a plurality of points along theirlength, and by dividing the surface of the roll body into zones I mayremove any individual roll bar or spacer from the assembly for repair orreplacement without disturbing any of the other elements. Thisconstruction not only makes for a better beater roll, but, one which maybe successfully repaired without removal from the machine.

The principal object of my invention is therefore an improved beaterroll for beaters and like refiners.

Another object is an improved filling for beater rolls by means of whicha maximum number of roll bars may be employed and a minimum spacingbetween bars may be obtained, thereby reducing to the minimum theslotting of the roll.

Another object is an improved beater roll in which the number of rollbars, as well as the thickness thereof, and the spacing between saidbars, may be varied. With a slotted roll, it is not possible to vary thenumber and spacing of the roll bars.

A further object is an improved beater roll in which the filling,comprised of the roll bars and spacers, can be removed and/or replacedwithout the necessity of removing the beater roll from the beater.

A further object is an improved beater roll in which any individual rollbar or spacer can be removed and/ or replaced without disturbing any ofthe remaining roll bars 'or spacers.

A further object is an improved beater roll in which the roll bars aremounted directly upon the outer circumferential face of the roll body.

A further object is an improved beater roll in which the circumferenceof the roll body is divided into segments or zones by spacers set intoslots formed in the roll body and extending parallel to the axisthereof, and in which said spacers are removably locked in position onthe roll body.

Other objects and novel features of the construction and arrangement ofparts comprising my improved beater roll will appear as the descriptionthereof progresses.

In the'acco-mpanying drawings illustratin a preferred embodiment of myinvention:

Figure l is a fragmentary end elevational view, partly in section, ofthe upper portion of a beater roll.

Figure 2 is an end elevational view of the assembled beater roll.

Figure 3 is a side elevational view showing one With the common type ofslotted rolls, it is:

customary to provide slots in these spiders of proper size and number toaccommodate the size and number of fly bars designated. It'will beapparent therefore that While the thickness'of the fly bar mayconceivablybevaried at the cutting or working edge, the size of thatportion fitting into the slot or the number of bars in the roll or thespacing between the bars cannot be varied. It also is'generally'necessaryto fill such rolls with'wood-spacersor wedges driven betweenthebars'and' projecting-below the bars, the swelling of the woods beingdepended upon to solidly hold the bars'in place and toanchor the woodsbeneath the bars to prevent them from'working out in'operation.

In my new roll I'bui-l'd up theroll body from individual heads orspiders pressedon the spindle orshaft much the same as in the commontypes of beater rolls but instead of these heads being turned in stepson their outer peripheral surfaces I turn these outer surfaces hat andon a perfect plane across the face of the roll. After this tumingoperation is completed I machine approximately sixteen slots l3 acrossthe face of the roll,

dividing the roll into sixteen equal segments on.

the circumference. A'forged band or hooked ring I4 is then shrunkon eachof the inside heads (number of heads depending on length or face ofroll) and'the under surface of this band where the hook is formed,marked I51 is accurately machined in relation to the outsidecircumference of the 'roll heads.

Referring to Fig. 3, there is shown in side elevation, a metal segmentspacer bar 16 having cutout portions I'l' intermediate its ends andprovided with hook member l8 for engaging the under faceof the hookportions of the bands or rings l4. At their ends, bars l6, are providedwith hook members [9 for a purposeto be hereinafter described.

In filling the roll, sixteen segmentspacer bars I6 of the properthickness'and width, are inserted into the grooves I3 and then driven tocontact position under thehook members 15 of the bands or rings; Hi;This divides the surface of the roll body I I into'sixteen equalsegments.

For clearness of description it will be under? stood that the roll beingdescribed will contain one hundredand ninety, two cutting barsthreesixteenths thick; with equal spacing approximately .6715" at baredges so that each of the sixteen segments will containtwelvecuttingbars The segments are filled with cutting bars and intermediatespacer bars 2 I, illustrated in end section in Fig. l, but the sideelevation of the segment-spacer bar I6 in Fig. 31' illustrates equallywell the construction, in side elevation, of the cutting bars 20 andintermediate spacer bars 2|.

Filling of the segments will progress from the fixed holding spacers H5at the end of each segment, working towards the center of that segment,installing first a cutting bar 20 and then an intermediate spacer 2 I,and driving each bar and each spacer tightfagainst its neighbor, withthe hook members I8"'locking'under the hook portion l5 of the bands orrings l4. This continues until all but the last intermediate spacer 21has been installed.

It may be presumed that there will be some variation in theirolledthickness of the cutting bars '20; and the-final intermediate spacer mayhaveto' be-machined to proper size to draw up tightly. this-final.segment of filling.

As stated above Fig. 3 may serve equally well to illustrate the segmentspacer (6, the intermediate spacers 2l and the cutting bars 20. Theintermediate spacer bars=2l difier only from the segment spacers 16in.that they are narrower and. rest on thesurfacehofithe. roll body,whereasthe segment spacers. l 6 seat in the grooves l 3. Fig.4..) thespacers: l6 and .2 l, assuch bars. extend out- (See warclly'beyond thespacers to form the cell pack-- etsifor'thestock.beingtreated.v (SeeFig. 1.)

torproject beyond the spacers to form thecell pockets. Howeveninsteadzof using cutting bars:

which are-1%" thick; I.mayuseiother bar thicknesses, as for example A"or 4;, with the same spacers, and .vary the-number of bars in. eachsegment to: compensatezfor the :change in thickness,

and'utilizeth'esize of the final ifitted. spacer inv each: segment tocompensate for irregularities in spacing; Of course, .it will.beunderstood .that' with woodenspacers,swelling takes care of minorvariations in thickness.

The remainingxsegmentsrare filledzini the manner above. described; Whenthis operation is completed, the'hook :members' 19' inv the cutting bars'20 andxspacers l6'and 2|, come into alignment; andprovide al'continuougroove 22 'on'th'e endfa'ce of the assembly;

23 designates holding members-of which there areieigh 't equallyspacedabout and on each end ofthez assembly: These holdin members 23' areprovided 'on'theiri innersurface, top and bottom,witharcuate'proiections 24 and 25 respectively. The arcuate projections24'seat in the grooves 22Lform'edin' the'endsofthe spacers and'cuttingbars; and the arcuate projections 25 seat in -a' circular' groove 26formed in the-end of the rollb'ody"! I. The holding members'are drivenand securely anchored inplace by a series of fiat head-machine screws"21 screwing into the roll body'l I.

A renewable and removable wearing plate 28" terpose a suitable gasketbetween the ends of'the bars and spacers'and 'theinner'face ofthe'holding members 23.

After the beater roll is installed in abeater, and should itbecomenecessary to replace the filling of bars and spacers, or to renewdamaged cutting bars, the attendant need only remove the'hood Also the"cuttin'gbars 20 are wider than or curb from the beater, remove thatsegment of the wearing plate 28 and holding member 23 which are adjacentto the section holding the parts to be removed, remove the final fittedspacer in such segment, whereupon each bar and spacer may be easilydriven back from beneath the band or ring M. The damaged bar or spacer,or each or all of them in a segment can then be replaced and a fittedwedge spacer driven to securely lock the elements in position. The sameprocedure would follow for the complete roll if entire renewal isnecessary.

The spacers,preferably of metal, need not be renewed, but can be usedover and over with the exception of the one fitted spacer, and the lastto be installed in a segment. For ease in fitting, particularly on thejob, this spacer may be made of some fibrous material and preferably ofa non= splinterable wood; indeed, in some installations it may bepreferable to use a majority of wooden spacers.

Having thus described my invention, what I claim as new is:

1. In a beater roll, the combination of a shaft, a roll body having amachined surface of a predetermined radius mounted thereon for rotationtherewith and having a plurality of grooves extending longitudinallythereof and dividing the surface of the body into segments, lockingrings secured to the surface of the body and spaced along the lengththereof, segment separating spacers seating in said groove and locked tothe body by the locking rings, and a filling for each of the segmentscomprising a plurality of intermediate spacers and cutter bars arrangedalternately in the segment, locked to the locking ring, and with theirlower ends in engagement with the surface of the roll body.

2. In a beater roll, the combination of a shaft, a. cylindrical rollbody having a machine surface of a predetermined radius mounted thereonfor rotation therewith, and having a plurality of rooves extendinglongitudinally thereof parallel to the shaft and dividing the surface ofthe body into segments, locking rings secured to the surface of the bodyand spaced parallel to each other along the length thereof, segmentseparating spacers having their lower edges seating in said longitudinalgrooves and with the body of said spacers extending radially outwardfrom the roll body, said spacers locked to the roll body by the lockingrings, a filling for the segments comprisin a plurality of intermediatespacers and cutter bars alternately arranged in the segments, locked tothe roll body, and with their lower edges in engagement with the surfaceof the roll body, there being a circular groove formed in the end of theroll body and a circular groove, concentric with said first-named grooveformed in the end of the spacers and cutting bars, and a segmentalcovering for the end of the spacers and cutting bars secured to the endof the roll body.

3. In a beater roll, the combination of a shaft, a cylindrical roll bodyhaving a machined surface of a predetermined radius mounted thereon forrotation therewith, and having a plurality of grooves extendinglongitudinally thereof parallel to the shaft and dividin the surface ofthe body into segments, locking rings secured to the surface of the bodyand spaced parallel to each other along the length thereof, segmentseparating spacers having their lower edges seating in said longitudinalgrooves and with the body of said spacers extending radially outwardfrom the roll body, said spacers locked to the roll bo y by the lockingrings, a filling for the segments comprising a plurality of intermediatespacers and cutter bars alternately arranged in the segments, locked tothe roll body, and with their lower edges in engagement with the surfaceof the roll body, there being a circular groove formed in the end of theroll body and a circular groove, concentric with said first-named grooveformed in the end of the spacers and cutting bars, and a covering forthe end of the spacers and cutting bars comprising segments each havingarcuate projections on their inner surface, top and bottom, the topprojection fitting into the circular groove formed in the end spacersand cutting bars, and the bottom projection fitting into the circulargroove formed in the end of the roll body, and means for securing saidsegments to the roll body.

4. A beater roll comprising a cylindrical body having a machined surfaceof a predetermined radius, walls forming a plurality of grooves in saidsurface, said grooves extending longitudinally of said body and beingspaced to divide said surface into equal segments, a plurality ofretaining rings secured to the surface of said body, a flange on saidrings defining a hook portion for said rings outward of said surface,machined steel segment spacers adapted to fit in said grooves and beingnotched on their inner margins to define hook portions thereincomplementary in shape to the hook portions defined by said rings, saidsegment spacers being retained by said rings with said hook portions ofboth interlocking, cutter bars and bar spacers adapted to abut themachined surface of the body throughout its length and being notched ontheir inner margins to define hook portions complementary in shape tothe hook portions defined by said rings, said cutter bars and said barspacers being arranged alternately between said segment spacers, andbeing retained by said ring with the hook portions of the said bars andbar spacers interlocking with the hook portions of said rings, and aplurality of segmental holding members secured to each end of said body,said holding members each adapted to abut the ends of said cutter bars,bar spacers, and segment spacers and to retain the same, and saidholding members each covering only the space of a single segment.

FRANK HAYES.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,185,926 North June 6, 19161,506,133 Peterson Aug. 26, 1924 1,838,875 Shartle Dec. 29, 19312,008,228 Riehm July 16, 1935 2,324,845 Jones July 20, 1943 FOREIGNPATENTS Number 4 Country Date 5,018 Great Britain of 1880 469,551 GreatBritain July 2'7, 1937

